1.Tribute to Alfred Krner and Guowei Zhang This special issue of Geoscience Frontiers（GSF）is a tribute vol-ume honoring the life and career of two world-renowned scientists,Professor Alfred Kroner and Academician Gu...1.Tribute to Alfred Krner and Guowei Zhang This special issue of Geoscience Frontiers（GSF）is a tribute vol-ume honoring the life and career of two world-renowned scientists,Professor Alfred Kroner and Academician Guowei Zhang.Weassemble here a set of research papers related to continental growth in Central Asia,展开更多
The rational layout of urban commercial space is conducive to optimizing the allocation of commercial resources in the urban interior space. Based on the commercial POI (Point of Interest) data in the central district...The rational layout of urban commercial space is conducive to optimizing the allocation of commercial resources in the urban interior space. Based on the commercial POI (Point of Interest) data in the central district of Mianyang, the characteristics of urban commercial spatial pattern under different scales are analyzed by using Kernel Density Estimation, Getis-Ord , Ripley’s K Function and Location Entropy method, and the spatial agglomeration characteristics of various industries in urban commerce are studied. The results show that: 1) The spatial distribution characteristics of commercial outlets in downtown Mianyang are remarkable, and show a multi-center distribution pattern. The hot area distribution of commercial outlets based on road grid unit is generally consistent with the identified commercial density center distribution. 2) The commercial grade scale structure has been formed in the central urban area as a whole, and the distribution of commercial network hot spots based on road grid unit is generally consistent with the identified commercial density center distribution. 3) From the perspective of commercial industry, the differentiation of urban commercial space “center-periphery” is obvious, and different industries show different spatial agglomeration modes. 4) The multi-scale spatial agglomeration of each industry is different, the spatial scale of location choice of comprehensive retail, household appliances and other industries is larger, and the scale of location choice of textile, clothing, culture and sports is small. 5) There are significant differences in specialized functional areas from the perspective of industry. Mature areas show multi-functional elements, multi-advantage industry agglomeration characteristics, and a small number of developing areas also show multi-advantage industry agglomeration characteristics.展开更多
Wyner-Ziv Video Coding (WZVC) is considered as a promising video coding scheme for Wireless Video Sensor Networks (WVSNs) due to its high comp ression efficiency and error resilience functionalities, as well as its lo...Wyner-Ziv Video Coding (WZVC) is considered as a promising video coding scheme for Wireless Video Sensor Networks (WVSNs) due to its high comp ression efficiency and error resilience functionalities, as well as its low encoding comp lexity. To achieve a good Rate-Distortion (R-D) performance, the current WZVC paradigms usually adopt an end-to-end rate control scheme in which the decoder rep eatedly requests the additional decoding data from the encoder for decoding Wyner-Ziv frames. Therefore, the waiting time of the additional decoding data is esp ecially long in multihop WVSNs. In this paper, we propose a novel progressive in-network rate control scheme for WZVC. The proposed in-network puncturing-based rate control scheme transfers the partial channel codes puncturing task from the encoder to the relay nodes. Then, the decoder can request the additional decoding data from the relay nodes instead of the encoder, and the total waiting time for decoding Wyner-Ziv frames is reduced consequently. Simulation results validate the proposed rate control scheme.展开更多
This article reviews Fuqing ZHANG’s contributions to mesoscale atmospheric science,from research to mentoring to academic service,over his 20-year career.His fundamental scientific contributions on predictability,dat...This article reviews Fuqing ZHANG’s contributions to mesoscale atmospheric science,from research to mentoring to academic service,over his 20-year career.His fundamental scientific contributions on predictability,data assimilation,and dynamics of high impact weather,especially gravity waves and tropical cyclones,are highlighted.His extremely generous efforts to efficiently transmit to the community new scientific knowledge and ideas through mentoring,interacting,workshop organizing,and reviewing are summarized.Special appreciation is given to his tremendous contributions to the development of mesoscale meteorology in China and the education of Chinese graduate students and young scientists.展开更多
Tangya Tribute Rice is a famous and special product in Shandong Province,and it was awarded the National Geographical Indication Certificate trademark in 2011.This paper elaborated the specific production area,unique ...Tangya Tribute Rice is a famous and special product in Shandong Province,and it was awarded the National Geographical Indication Certificate trademark in 2011.This paper elaborated the specific production area,unique production environment,rich cultural history and unique product quality of Tangya Tribute Rice.In addition,from the aspects of choice of origin,variety selection,production management,timely harvesting and processing,it summarized the unique production methods of Tangya Tribute Rice.Besides,it discussed its development prospects,in order to maintain the brand quality of Tangya Tribute Rice to the greatest extent,and further improve the brand awareness and market competitiveness of Tangya Tribute Rice in the domestic and international markets.展开更多
Medicine was one of the articles of tribute paid by other countries and kingdoms to the imperial court of the Qing dynasty(1644–1912).The act of paying tributes and the rituals associated with it enhanced communicati...Medicine was one of the articles of tribute paid by other countries and kingdoms to the imperial court of the Qing dynasty(1644–1912).The act of paying tributes and the rituals associated with it enhanced communication and helped establish relationships between ancient China and other nations or territories.The imperial court was generous in return,which attracted many countries to pay tributes.This paper analyzes how medicines as tributes played an important role in consolidating the dominant status of ancient China,and in promoting the exchange of knowledge between Chinese and Western medicine.展开更多
On 10 September 2006, Professor Zheng Chengsi, the renowned Chinese IP law scholar, Chairman of the IP Law Society of the China Law Society, Vice-President of the Copyright Society of China, and member of the Chinese ...On 10 September 2006, Professor Zheng Chengsi, the renowned Chinese IP law scholar, Chairman of the IP Law Society of the China Law Society, Vice-President of the Copyright Society of China, and member of the Chinese Academy of Social Sciences, passed away in Beijing at the age of 62.展开更多
In this paper the track behavior of passenger car was studied. The vehicle driving trajectory and driving direction were defined, and a classification of the type of vehicle trajectories along the curves was developed...In this paper the track behavior of passenger car was studied. The vehicle driving trajectory and driving direction were defined, and a classification of the type of vehicle trajectories along the curves was developed. The statistical parameters of vehicle trajectory samples in free flow and their frequency curves and cumulative frequency curves were achieved, K-S test and chi-square test were used to test normal distribution and gamma distribution for collected sample data, and the probabili- ty density functions were given. At last, dispersion degree between vehicle trajectory random varia- ble and the characteristic value of cumulative frequency curve in each key cross section in curves was analyzied. The proposed conclusion can provide theoretical support for the reasonable optimization of widen curve, design of alignment and the management of counter flow conflicts.展开更多
文摘1.Tribute to Alfred Krner and Guowei Zhang This special issue of Geoscience Frontiers（GSF）is a tribute vol-ume honoring the life and career of two world-renowned scientists,Professor Alfred Kroner and Academician Guowei Zhang.Weassemble here a set of research papers related to continental growth in Central Asia,
文摘The rational layout of urban commercial space is conducive to optimizing the allocation of commercial resources in the urban interior space. Based on the commercial POI (Point of Interest) data in the central district of Mianyang, the characteristics of urban commercial spatial pattern under different scales are analyzed by using Kernel Density Estimation, Getis-Ord , Ripley’s K Function and Location Entropy method, and the spatial agglomeration characteristics of various industries in urban commerce are studied. The results show that: 1) The spatial distribution characteristics of commercial outlets in downtown Mianyang are remarkable, and show a multi-center distribution pattern. The hot area distribution of commercial outlets based on road grid unit is generally consistent with the identified commercial density center distribution. 2) The commercial grade scale structure has been formed in the central urban area as a whole, and the distribution of commercial network hot spots based on road grid unit is generally consistent with the identified commercial density center distribution. 3) From the perspective of commercial industry, the differentiation of urban commercial space “center-periphery” is obvious, and different industries show different spatial agglomeration modes. 4) The multi-scale spatial agglomeration of each industry is different, the spatial scale of location choice of comprehensive retail, household appliances and other industries is larger, and the scale of location choice of textile, clothing, culture and sports is small. 5) There are significant differences in specialized functional areas from the perspective of industry. Mature areas show multi-functional elements, multi-advantage industry agglomeration characteristics, and a small number of developing areas also show multi-advantage industry agglomeration characteristics.
基金This paper was supported by the National Key Basic Re- search Program of China under Grant No. 2011 CB302701 the National Natural Science Foundation of China under Grants No. 60833009, No. 61133015+2 种基金 the China National Funds for Distinguished Young Scientists under Grant No. 60925010 the Funds for Creative Research Groups of China under Grant No. 61121001 the Program for Changjiang Scholars and Innovative Research Team in University under Grant No. IRT1049.
文摘Wyner-Ziv Video Coding (WZVC) is considered as a promising video coding scheme for Wireless Video Sensor Networks (WVSNs) due to its high comp ression efficiency and error resilience functionalities, as well as its low encoding comp lexity. To achieve a good Rate-Distortion (R-D) performance, the current WZVC paradigms usually adopt an end-to-end rate control scheme in which the decoder rep eatedly requests the additional decoding data from the encoder for decoding Wyner-Ziv frames. Therefore, the waiting time of the additional decoding data is esp ecially long in multihop WVSNs. In this paper, we propose a novel progressive in-network rate control scheme for WZVC. The proposed in-network puncturing-based rate control scheme transfers the partial channel codes puncturing task from the encoder to the relay nodes. Then, the decoder can request the additional decoding data from the relay nodes instead of the encoder, and the total waiting time for decoding Wyner-Ziv frames is reduced consequently. Simulation results validate the proposed rate control scheme.
基金supported by the Natural Science Foundation of China(Grant Nos.42030604,41875051,and 41425018)during the writing of this review。
文摘This article reviews Fuqing ZHANG’s contributions to mesoscale atmospheric science,from research to mentoring to academic service,over his 20-year career.His fundamental scientific contributions on predictability,data assimilation,and dynamics of high impact weather,especially gravity waves and tropical cyclones,are highlighted.His extremely generous efforts to efficiently transmit to the community new scientific knowledge and ideas through mentoring,interacting,workshop organizing,and reviewing are summarized.Special appreciation is given to his tremendous contributions to the development of mesoscale meteorology in China and the education of Chinese graduate students and young scientists.
基金Genetic Breeding Post Construction Project of Rice Innovation Team of Modern Agricultural Industrial Technology System of Shandong Province(SDAIT-17-01).
文摘Tangya Tribute Rice is a famous and special product in Shandong Province,and it was awarded the National Geographical Indication Certificate trademark in 2011.This paper elaborated the specific production area,unique production environment,rich cultural history and unique product quality of Tangya Tribute Rice.In addition,from the aspects of choice of origin,variety selection,production management,timely harvesting and processing,it summarized the unique production methods of Tangya Tribute Rice.Besides,it discussed its development prospects,in order to maintain the brand quality of Tangya Tribute Rice to the greatest extent,and further improve the brand awareness and market competitiveness of Tangya Tribute Rice in the domestic and international markets.
基金This study wasfinanced by the grant from Beijing Social Science Foundation of China(No.19LSB006).
文摘Medicine was one of the articles of tribute paid by other countries and kingdoms to the imperial court of the Qing dynasty(1644–1912).The act of paying tributes and the rituals associated with it enhanced communication and helped establish relationships between ancient China and other nations or territories.The imperial court was generous in return,which attracted many countries to pay tributes.This paper analyzes how medicines as tributes played an important role in consolidating the dominant status of ancient China,and in promoting the exchange of knowledge between Chinese and Western medicine.
文摘On 10 September 2006, Professor Zheng Chengsi, the renowned Chinese IP law scholar, Chairman of the IP Law Society of the China Law Society, Vice-President of the Copyright Society of China, and member of the Chinese Academy of Social Sciences, passed away in Beijing at the age of 62.
基金Supported by the National Natural Science Foundation of China(5097811450808093)
文摘In this paper the track behavior of passenger car was studied. The vehicle driving trajectory and driving direction were defined, and a classification of the type of vehicle trajectories along the curves was developed. The statistical parameters of vehicle trajectory samples in free flow and their frequency curves and cumulative frequency curves were achieved, K-S test and chi-square test were used to test normal distribution and gamma distribution for collected sample data, and the probabili- ty density functions were given. At last, dispersion degree between vehicle trajectory random varia- ble and the characteristic value of cumulative frequency curve in each key cross section in curves was analyzied. The proposed conclusion can provide theoretical support for the reasonable optimization of widen curve, design of alignment and the management of counter flow conflicts.
